ES2273573B1 - BIFFUNCTIONAL ENERGY ABSORBING SYSTEM. - Google Patents
BIFFUNCTIONAL ENERGY ABSORBING SYSTEM. Download PDFInfo
- Publication number
- ES2273573B1 ES2273573B1 ES200501294A ES200501294A ES2273573B1 ES 2273573 B1 ES2273573 B1 ES 2273573B1 ES 200501294 A ES200501294 A ES 200501294A ES 200501294 A ES200501294 A ES 200501294A ES 2273573 B1 ES2273573 B1 ES 2273573B1
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- Spain
- Prior art keywords
- elements
- impactor
- impact
- energy
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000006096 absorbing agent Substances 0.000 claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 230000001588 bifunctional effect Effects 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vibration Dampers (AREA)
Abstract
Sistema absorbedor de energía bifuncional.Bifunctional energy absorber system.
Este sistema, ubicado en una zona donde se requiera integridad del componente a baja velocidad y absorción de energía a alta velocidad (por ejemplo, entre los agregados rígidos del automóvil y el parachoques), esta constituido por un conjunto de vigas o elementos (1) que tienen un comportamiento aproximadamente elástico frente a cargas de impacto de baja velocidad y gran anchura de impactor, y tiene un comportamiento elastoplástico con absorción de energía frente a impactos de alta velocidad y con pequeña anchura de impactor. Con esta bifunción se resuelve el compromiso de que el absorbedor permanezca íntegro en casos de velocidad de impacto baja, y absorba energía a velocidad de impacto alta.This system, located in an area where require component integrity at low speed and absorption of high speed energy (for example, between rigid aggregates of the car and the bumper), is constituted by a set of beams or elements (1) that have a behavior approximately elastic against impact loads of low speed and wide width of impactor, and has an elastoplastic behavior with absorption of energy against impacts of high speed and with small width of impactor. With this bifunction, the commitment that the absorber remains intact in cases of low impact velocity, and absorb energy at high impact speed.
Description
Sistema absorbedor de energía bifuncional.Bifunctional energy absorber system.
La presente invención se refiere a un sistema absorbedor de energía, especialmente concebido para la aplicación en parachoques de vehículos pero que también puede ser usado para otras aplicaciones en las que sea requerida una absorción de energía a alta o baja velocidad.The present invention relates to a system energy absorber, specially designed for the application in vehicle bumpers but that can also be used for other applications where absorption of High or low speed energy.
El objeto de la invención es proporcionar un dispositivo absorbedor de energía que sea capaz de, frente a cargas de baja velocidad y gran anchura de impactor y frente a cargas de alta velocidad y baja anchura de impactor, absorber, en un caso, energía de deformación elástica y, en el segundo caso, energía de deformación plástica.The object of the invention is to provide a energy absorbing device that is capable of facing loads of low speed and wide width of impactor and against loads of high speed and low width of impactor, absorb, in one case, elastic deformation energy and, in the second case, energy of plastic deformation
El campo de aplicación de la presente invención es por tanto el de la seguridad pasiva.The field of application of the present invention It is therefore that of passive security.
Los parachoques de los automóviles deben se diseñados para no presentar daños en impactos de baja y alta velocidad y para absorber energía a altas velocidades de impacto. En el último lustro los constructores han hecho hincapié en la protección de peatones. El diseño de parachoques para protección de peatones es complicado porque los requerimientos para este tipo de caso de carga entran en conflicto con los requerimientos funcionales.Automobile bumpers must be designed to avoid damage to low and high impacts speed and to absorb energy at high impact speeds. In the last five years the builders have emphasized the pedestrian protection The bumper design for protection of pedestrians is complicated because the requirements for this type of load case conflict with the requirements functional.
Obviamente el cuerpo humano no puede soportar impactos de alta energía ni impactos súbitos, sin un sustancial daño de los músculos o el tejido óseo.Obviously the human body can't stand high energy impacts or sudden impacts, without substantial damage of the muscles or bone tissue.
Entraña bastante dificultad reducir la transmisión de energía entre el parachoques y el peatón bajo un impacto, ya que en los vehículos no hay mucho espacio entre el parachoques y agregados del motor u otros elementos rígidos.It involves quite difficulty reducing the power transmission between the bumper and the pedestrian under a impact, since in vehicles there is not much space between the bumpers and engine aggregates or other rigid elements.
Además, los parachoques deben estar fabricados con materiales resistentes para mantener la apariencia y la forma a lo largo del tiempo y para asegurar la primera función del parachoques, que es evitar los daños en el vehículo.In addition, the bumpers must be manufactured with resistant materials to maintain the appearance and shape to over time and to ensure the first function of the bumper, which is to prevent damage to the vehicle.
Por último, cabe destacar que el parachoques y los correspondientes absorbedores, realizando su primera función de protección del vehículo, debería quedar mínimamente dañado en situaciones tan habituales en la conducción como es el aparcamiento, situación en la que es habitual que se produzcan impactos de baja velocidad y gran anchura de impactor (de hecho un vehículo al aparcar impacta contra otro).Finally, it should be noted that the bumper and the corresponding absorbers, performing their first function of vehicle protection should be minimally damaged in Common driving situations such as parking, situation in which it is common for low impacts to occur speed and wide width of impactor (in fact a vehicle at parking hits another).
En los párrafos anteriores se menciona la principal aplicación del absorbedor objeto de ésta patente, pero también se puede utilizar en aquellas situaciones en las que se requerida una absorción de energía a alta velocidad de impacto y respuesta elástica en condiciones de baja velocidad de impacto y gran anchura de impactor.In the previous paragraphs the main application of the absorber object of this patent, but It can also be used in situations where required energy absorption at high impact speed and elastic response in low impact conditions and large width of impactor.
El sistema absorbedor de energía que la invención propone resuelve de manera plenamente satisfactoria la problemática anteriormente expuesta en los distintos aspectos comentados, proporcionando un dispositivo capaz de permanecer íntegro en situaciones de choque de baja velocidad y gran anchura de choque, siendo también capaz de absorber la energía de un impacto enérgico y súbito (salvaguardando al peatón si el absorbedor fuese aplicado a un parachoques).The energy absorbing system that the proposed invention resolves in a fully satisfactory manner the problematic previously exposed in the different aspects commented, providing a device capable of staying Full in situations of low speed and wide width shock of shock, being also able to absorb the energy of a energetic and sudden impact (safeguarding the pedestrian if the absorber was applied to a bumper).
Para ello, y de manera más concreta, el sistema de absorción está previsto ser ubicado entre la parte externa y las piezas estructurales donde se quiere absorber la energía (por ejemplo, en el caso de un parachoques, entre la viga frontal/posterior y la parte externa del parachoques).To do this, and more specifically, the system of absorption is planned to be located between the external part and the structural parts where you want to absorb energy (for example, in the case of a bumper, between the beam front / rear and the outside of the bumper).
El absorbedor comprende una pluralidad de elementos o vigas dispuestas en la dirección del impacto, formando alineaciones longitudinales o radiales, pudiendo dichos elementos tener cualquier geometría como sección, siendo esta constante o variable a lo largo de su longitud, pudiendo también formar un cierto ángulo hacia un lado o hacia otro. Los distintos elementos pueden estar unidos en distintos puntos o a lo largo de toda su longitud, es decir, mediante separadores discontinuos o mediante separadores continuos, y en cualquier caso montados sobre un soporte común.The absorber comprises a plurality of elements or beams arranged in the direction of impact, forming longitudinal or radial alignments, said elements being able to have any geometry as a section, being this constant or variable along its length, also being able to form a certain angle to one side or another. The different elements they can be joined at different points or throughout their entire length, that is, by discontinuous separators or by continuous separators, and in any case mounted on a common support.
En el plano horizontal el comportamiento es diferente dependiendo de la anchura del impactor, asíIn the horizontal plane the behavior is different depending on the width of the impactor as well
- \bullet?
- En el caso de impactor ancho, por ejemplo, el utilizado en los ensayos ECE R 42, los elementos trabajan a compresión y pandeo, trabajando en toda la anchura del impactor, de tal manera que son capaces de retenerlo elásticamente, es decir, sin sufrir deformación permanente.In the case of wide impactor, for example, the one used in the ECE R 42 tests, the elements they work under compression and buckling, working on the entire width of the impactor, so that they are able to retain it elastically, that is, without suffering permanent deformation.
- \bullet?
- En el caso de carga de impactor estrecho, por ejemplo, un impactor de peatones, los elementos trabajan a flexión ya que el impactor actúa como una cuña penetrando en el conjunto de elementos. Con éste comportamiento el impacto inicial es suave y se va absorbiendo energía de flexión elástica en un primer tramo y elastoplástica a continuación, hasta llegar a la densificiación en el tramo final de deformación.In the case of impactor loading narrow, for example, a pedestrian impactor, the elements they work flexing since the impactor acts like a wedge penetrating the set of elements. With this behavior the initial impact is smooth and bending energy is absorbed elastic in a first section and elastoplastic then until reach densification in the final stretch of deformation.
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características del invento, de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente:To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of it, is accompanied as part member of that description, a set of drawings where with illustrative and non-limiting nature, what has been represented next:
La figura 1.- Muestra una vista tridimensional del absorbedor en conjunto.Figure 1.- Shows a three-dimensional view of the absorber as a whole.
La figura 2.- Muestra el detalle de cada una de las filas de elementos o vigas unidas entre si, en este ejemplo, en toda su longitud.Figure 2.- Shows the detail of each of the rows of elements or beams joined together, in this example, in full length
La figura 3.- Muestra el detalle del comportamiento frente a una carga de baja velocidad y gran anchura de impactor.Figure 3.- Shows the detail of the behavior in front of a load of low speed and great width of impactor.
La figura 4.- Muestra el detalle del comportamiento frente a un impacto de alta velocidad y menor anchura del impactor.Figure 4.- Shows the detail of the behavior in the face of high speed impact and smaller width of the impactor.
La figura 5.- Muestra la curva de
fuerza/des-
plazamiento del impactor que resulta para el
caso de carga de baja velocidad y gran anchura de impacto.Figure 5.- Shows the force / displacement curve.
impactor placement resulting in the case of low speed loading and large impact width.
La figura 6.- Muestra la curva de
fuerza/des-
plazamiento del impactor para el caso de carga
de alta velocidad y anchura de impacto menor.Figure 6.- Shows the curve of force / dis-
impactor placement for the case of high speed loading and smaller impact width.
A la vista de las figuras referidas y más particularmente a la vista de la figura 1, puede observarse como el absorbedor está formado por un conjunto de elementos o vigas (1), en el ejemplo expuesto de sección cuadrada y varible cónicamente a lo largo de su longitud. Estos elementos (1) están unidos entre si mediante separadores longitudinales (2) para evitar el plano donde se ubican las uniones, separadores (2) que pueden ser continuos a lo largo de toda su longitud o discontinuos.In view of the referred figures and more particularly in view of Figure 1, it can be seen as the absorber is formed by a set of elements or beams (1), in the exposed example of square section and conically variable to along its length. These elements (1) are linked together using longitudinal separators (2) to avoid the plane where the joints, separators (2) that can be continuous are located at along its entire length or discontinuous.
Frente a un impacto de baja velocidad y gran anchura de impactor (3) todos los elementos (1) trabajan a compresión, con cierta componente de flexión y pandeo (4) y un colapso mínimo. La curva fuerza/desplazamiento del impactor que se obtiene es elástica.Facing a low speed and great impact impactor width (3) all elements (1) work at compression, with some bending and buckling component (4) and a minimum collapse The force / displacement curve of the impactor that You get is elastic.
En el caso de impacto de alta velocidad y anchura pequeña de impacto, el impactor (5) se introduce a modo de cuña en el absorbedor y hace que los elementos (1) trabajen a flexión (6) en su conjunto, colapsando (7) en el último tramo del impacto y obteniéndose una curva fuerza/desplazamiento del impactor suave en el instante inicial (8), con absorción en las zonas intermedias (9) y obteniendo una densificación en el tramo final (10).In the case of high speed impact and small impact width, the impactor (5) is introduced as a wedge in the absorber and makes the elements (1) work at flexion (6) as a whole, collapsing (7) in the last section of the impact and obtaining a force / displacement curve of the impactor soft at the initial moment (8), with absorption in the zones intermediate (9) and obtaining a densification in the final section (10)
Finalmente, decir que las alineaciones de
elementos (1) son preferentemente longitudinales, aunque también
pueden ser radiales, alineaciones que o bien son en la dirección
del impacto o bien pueden formar un cierto ángulo hacia uno u otro
lado. En cualquier caso, dichos elementos (1). con independencia de
los separadores (2), están montados sobre un soporte
común.Finally, to say that the alignments of elements (1) are preferably longitudinal, although they can also be radial, alignments that are either in the direction of impact or can form a certain angle to one side or the other. In any case, said elements (1). regardless of the spacers (2), they are mounted on a support
common.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200501294A ES2273573B1 (en) | 2005-05-30 | 2005-05-30 | BIFFUNCTIONAL ENERGY ABSORBING SYSTEM. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200501294A ES2273573B1 (en) | 2005-05-30 | 2005-05-30 | BIFFUNCTIONAL ENERGY ABSORBING SYSTEM. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2273573A1 ES2273573A1 (en) | 2007-05-01 |
| ES2273573B1 true ES2273573B1 (en) | 2008-06-01 |
Family
ID=38326436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES200501294A Expired - Fee Related ES2273573B1 (en) | 2005-05-30 | 2005-05-30 | BIFFUNCTIONAL ENERGY ABSORBING SYSTEM. |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2273573B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2015260B3 (en) * | 1985-12-05 | 1990-08-16 | Stamicarbon | BUMPER |
| EP0467193A1 (en) * | 1990-07-18 | 1992-01-22 | BASF Aktiengesellschaft | Bumper for motor vehicles |
| JPH0752735A (en) * | 1993-08-23 | 1995-02-28 | Toyota Motor Corp | Energy absorption structure of interior materials |
| EP0863056A1 (en) * | 1997-03-03 | 1998-09-09 | General Motors Corporation | Energy absorbing structure |
| WO2000001525A1 (en) * | 1998-07-02 | 2000-01-13 | Concept Analysis Corporation | Cup bumper absorber |
| DE19856162A1 (en) * | 1998-12-05 | 2000-06-21 | Daimler Chrysler Ag | Energy absorbing plastic structural member for energy absorbing components in vehicles has structural members in absorption direction and made of liquid crystal polymer |
-
2005
- 2005-05-30 ES ES200501294A patent/ES2273573B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2015260B3 (en) * | 1985-12-05 | 1990-08-16 | Stamicarbon | BUMPER |
| EP0467193A1 (en) * | 1990-07-18 | 1992-01-22 | BASF Aktiengesellschaft | Bumper for motor vehicles |
| JPH0752735A (en) * | 1993-08-23 | 1995-02-28 | Toyota Motor Corp | Energy absorption structure of interior materials |
| EP0863056A1 (en) * | 1997-03-03 | 1998-09-09 | General Motors Corporation | Energy absorbing structure |
| WO2000001525A1 (en) * | 1998-07-02 | 2000-01-13 | Concept Analysis Corporation | Cup bumper absorber |
| DE19856162A1 (en) * | 1998-12-05 | 2000-06-21 | Daimler Chrysler Ag | Energy absorbing plastic structural member for energy absorbing components in vehicles has structural members in absorption direction and made of liquid crystal polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2273573A1 (en) | 2007-05-01 |
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